condition mean min max ZT0-3 7.59211 7.59211 7.59211 ZT4-7 5.924675000000001 5.924675000000001 5.924675000000001 ZT8-11 5.66447 5.66447 5.66447 ZT12-15 6.243595 6.243595 6.243595 ZT16-19 7.86109 7.86109 7.86109 ZT20-23 6.729155 6.729155 6.729155